Here’s why I advise cruisers to avoid getting souvenir passport stamps at cruise ports.

here's one thing not to do and this is true at any cruise port and that is to get a souvenir stamp in your passport because it can bring unintended consequences

a souvenir stamp can actually invalidate their passport

alteration or mutilation of a passport is forbidden and it specifically says that alteration could make the passport invalid

sometimes flying back home can become problematic from other countries that are much more strict about their passport protocols